Its hard to put a dollar value on it since the value is determined by your skills and how you choose to monetize it.
I think its a good domain name that has potential.
It may be a challenge to figure out how to monetize it since its not really a buying keyword. However, any investment that costs about $1 a month and is getting that kind of search count could be a money maker if you find the right formula.
Don't re-invent the wheel, find other Susan Boyle sites and see how they are monetizing and try that.
Maybe put up a WP autoblog with adsense, cafepress links, p2p software links, etc.
Then create a hubpage and blogger blog each with a unique article that link to your site. Then spam several thousand blogs with your hub and blogger links using a tool like TrafficX or BlogSlammer. For added links, get the wordpress comment spammer and let it work too.
You should get a top five ranking to your hub and blogger pages in a few weeks. (or at least I have)